var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
let helpRouter = require('./routes/help');
let homeRouter = require('./routes/home');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/api', helpRouter);
// app.use('/home', homeRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

app.all("*", (req, res, next) => {         //匹配全局路由
  res.header("Access-Control-Allow-Origin", "*");    //解决cors的安全问题  添加请求头  跨域
  next();
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

let mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/provinces', function (err) {
  if (err) {
    console.log(err, "数据库连接失败");
    return;
  }
  console.log('数据库连接成功: app.js');
});

module.exports = app;
